Gas-furnace and connections for parts thereof.



L'. H. FREYMU TH.

GAS FURNACE AND CONNECTIONS FOR PARTS THEREOF.

APPLICATION man ssnzs. 1913.

1,135,006, Patented Apr. 13, 1915.

3 SHEETS-SHEET 1.

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L. H. FREYMU'TH. GAS FURNACE AND CONNECTIONS FOR'PARTS THEREOF. APPLICATION FILED SEPT. 25, 1913. 1,135,006. Patented Apr. 13, 1915.

3 SHEETS-SHEET 2.

I I I I I I a; -b I. H I I J1 0 I I l l l lllll Ill THE NORRIS PETERS C0.. PHOTC-LITHCM WASHINGTON, D. c.

L. H. FREYMUTH. GAS FURNACE AND comm-:cnous ron PARTS THEREOF.

APPLHIATION FILED SEPT- 25, I913,

Patented Apr. 13, 1915.

A w INVEA/T'O yrramvsz n; N llnw; PETERS CO. PHOTO-LITHQ, WASHINGTON, D. L.

LOUIIS"HQFRVEYMUTH; or Los Alvis-sums.cALironNrAJ.

eas rumv'acn Ann CONNECTIONS Iron. rams T ER OF.

To all whom it may concern:

"Be it known that I,"LoUIs jF-REYMU'rH,

a citizen oft'he 'United *States, residing at the city of-Los Angeles,in the county of Los Angeles and "State of California, have invented new and "useful"Improvements'in T Gas Furnaces and Connections for Parts Thereof, ofwhich'the' following is a specifi cation.

In the construction of gas furnaces it is desirable to have the-combustionchamber and fume conduits disconnected from the air'heatin-g chambers and theconduits which carry the heated air to it's p'laceofnse. It

is also desirable to so arrange the parts that the" minimum quantity "of heat will escape in the fume conduits. In orderto produce these results in :the'most economicalmanner it is necessary to construct a portion ofthe furnace ofacast metal and a portion thereof of sheet metal. r

'It is the object of my invention to accomplish the connection between the cast and sheet metal parts in such manner that-the joints *therebetweenshall be absolutely gas tightand to dothe work with the minimumamount oflabori 1 A further object is to so arrange the parts that the minimum amount of heat will'es cape in the fume conduits.

I accomplish these objects by the construc tion and arrangement of parts described herein and illustrated in the accompanying drawings forming a part hereof in which Figure 1 is a front elevation of a three unit furnace with parts broken away. Fig.

2 is a plan view" of Fig.1 partly broken.

away. Fig. 3 is a front elevation of a detached unit. Fig. 4 is a view in elevation of a detached unit. Figs. 5 and 6 are sectional detailviews of the different connections be tween the cast and sheet metal parts. Fig.

7 is a perspective of the'top wall of the com- I bustion chamber. Fig.- 8 is a longitudinal horizontal section of a three unit furnace. F ig. 9 is a section on the line 99 of Fig-8. In the drawings I have' illustra'ted my I furnace as being constructed of units so that furnaces of different capacities may be principally constructed from thesame kind of parts but a single unit may be provided with a cover and an outer jacket and constituteja I furnace. a V

I will describe myfurnace as formed of three units. Each unit is constructed in a similar manner and comprises a combustion Specification of Letters Bete nt I; l ateni tgd 1915 Application filed September 25, 1e1 s. s rial-no. 7913747.

chamber 10, "preferably rectangular; s des,'ibottom and end wallsof the combustion chamber are preferablymade of sheet metal. The top wall IlR-of-Ethe combustion chamber 'is formed Lof .castf metal and has asmany flue openings-l2 therein as there "are fines in the unit. "I have shown six. In.

practice there are usually eight of. these fines-but there may be as many as desired."

Around each flu'e opening thereis an up.-'

wardly extending flangelg and around and near the outer. edge ofj'wa'll 1-1 is a d wawardly' extending flange 19. I On flange 14;

are placed sheet metal S-shaped connecting strips 15 having oppositely opening troughs. In-the troughs ion the other sides of'the connecting strips arereceived the tops of the side and end walls of the combustion"v chamber. A suitable; quantity of cement (not shown) may -be-used in. these troughs to make the joint absolutely tight/Bolts 16 {hold plate 11 connected to the bottomof 5 the combustion chamber. 'rLike shaped con inecting strips are placed" on the ledges. around thesflueopenings. The bottomsof r the combustion jflues 17' 'are received "in the f troughs on the .othersides-of the connecting strips-and "-cementfmayf be used-in the troughs when the "parts. are. assembled, The

tops offthe combustion fluesf'are closed by. ast ron pl tes ha ing-d wnw ly.

tending flanges 19. ,s-shapea connecting strips "35 are used betweenthe tops of'the- 1 combustion .flues "and thej fclosure'lplate's therefor. Extending; across the," closure plates of the combustion 'flue's is'a' batfQO ,1

-Which is connected by bolt 2Ito the top of thecombustionchamber. These bolts and bar hold'the parts positively against acci-I dental separation. Near the top and in the edgewall offeach combustion flue is a small port '22 which opens-into a fumechamber 23. This fume chamber extends across the edges of the combustion flues that form a unit Its height is about one-half that ofthe flues to which it' is attached. It is narrow: and the top, bottom and side walls are formed ofsheet metal and the end walls 24 are of cast iron withinwardly projecting flangesaround the edges. These end walls are secured to the other portions by the shaped c onnectingstripsl and are secured together by bolts 25. In-the top portion ofone of the end walls is an opening 26.

which has a-circular flange 27 around it shown by dotted lines in Fig. 1 to which a conveyer pipe 28 is attached. This conveyer pipe connects the fume chambers of all the units at thetop thereof and opens into a stack 29. To the center of the bottom of each fume chamber is connected a.

pipe 30 which runs down to and connects with a conveyer pipe 31 which pipe runs below the combustion chambers and opens into stack 29. Pipes 30 and 31 carry off the main portion of the products of combustion. The other portion is carried off by pipe 28. A burner 32 runs longitudinally of each combustion chamber and is supplied with the usual cocks and supply pipe so that each burner can be independently regulated.

In the construction of a furnace one or more units is or are inclosed by a sheet metal cover 33 in which the units are suitably held at a distance from the side and end walls. This cover extends to the bottoms of the combustion chambers and from the top thereof the heated air is led to its place of use in the usual well known manner. An open top outer jacket 3i incloses the units and cover which are spaced therefrom an inch or two so that all the air to be heated is drawn down between the cover and acket and then passes up between the combustion fines and other parts and is heated by the heat.

from such parts. The units are supported a suitable distance above the bottom of the outer jacket. It will be observed that the combustion fines and fume chambers are relatively wide and narrow thereby providing a very large radiating surface. This construction is rendered economical and practical by the use of cast ironends for the parts which are provided with flanges. The use of cast iron ends is rendered economical and practical by the use of my 3- shaped connecting strips. These connecting strips can be used to join any cast iron part to a sheet metal part without the use of rivets.

Having described my invention what I claim is:

1. In a hot air furnace the combination of sheet metal flues; cast iron tops for said fines, said tops having downwardly projecting flanges; a combustion chamber having a cast iron top with flue openings therein and upwardly projecting flanges around said openings and having the other walls of said chamber of metal; and s-shaped sheet metal connectors, the troughs of which on one side receive the flanges of the cast iron parts and on the other side the troughs receive the ends of the flues.

2. In a gas furnace a plurality of separated combustion fiues, each connected to the top of a-combustion chamber and having a port in its edge wall near the top thereof; a fume chamber connected to the combustion flues by the ports near the tops thereof; a transverse bottom conveyer pipe below the combustion chamber; a connection from said conveyer pipe to the bottom of said fume chamber; a transverse top conveyer pipe connected to the fume chamber near the top; and a stack connected to said top and bottom conveyer pipes.

Inwitness that I claim the foregoing I have hereunto subscribed my name this 13 day of September, 1913.

LOUIS H. FREYMUTH.

Witnesses:

G. E. HARPHAM, FRANK VVATERFIELD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

